Pulse Load Resistors Ensure Safe Dissipation of Voltage Peaks

Passive Components Pulse Load Resistors Ensure Safe Dissipation of Voltage Peaks

2025-12-01 From Stefanie Eckardt | Translated by AI 2 min Reading Time

Related Vendors

Isabellenhütte introduces new pulse load resistors that absorb voltage peaks in power electronics for automotive applications, protecting downstream components and parts from damage caused by increased load in the circuit. The pulse load resistors stand out especially with a space-saving design and rapid heat dissipation.

Isabellenhütte introduces new pulse load resistors that absorb voltage peaks in power electronics for automotive applications(Image: Isabellenhütte) — Isabellenhütte introduces new pulse load resistors that absorb voltage peaks in power electronics for automotive applications
(Image: Isabellenhütte)

Voltage spikes can be triggered by rapid switching operations and further amplified by inductances. This can damage or destroy downstream components. With the new PMx pulse load resistors from Isabellenhütte—the first available model being the PMT (2817)—these peaks can be safely dissipated. The series is based on Isabellenhütte's proven SMD shunt resistors but is designed not for precise measurement tasks, but for damping voltage spikes.

Self-Developed Resistor Material

The PMT design follows the ISA-Plan principle: on a copper substrate is a foil made of the in-house resistor material Noventin, which optimizes pulse load capacity with its high specific resistance. The voltage peaks are temporarily stored in the resistor material and dissipated as heat into the circuit board through the large copper terminals.

Depending on the pulse energy encountered, one or more pulse load resistors may be required for absorption. Multiple resistors can be connected as arrays in parallel or in series to evenly dissipate the loads. The number and type of connections depend on the expected pulse load, the space requirements on the circuit board, and the desired resistance values.

Application Field E-Fuses

Within a snubber circuit consisting of a resistor and capacitor, the PMx resistors are suitable for use in e-fuses, resettable electronic fuses, such as those installed in cigarette lighters. If an excessive load is drawn, the e-fuse interrupts the contact to protect the connected devices. The rapid switching off of the e-fuse activates the snubber circuit. The capacitor initially absorbs the high pulse load and discharges it through the pulse load resistor. This resistor converts the pulse energy into heat and dissipates it to the circuit board via the copper legs.

AEC-Q200-Compliant

All resistors in the PMx series are tested according to AEC-Q200 standards. Within this series, the PMT in size 2817 with a resistance range from 50 mOhm to 2.5 Ohm (R050, R500, 1R00, and 2R50) is currently available. The PMT is currently in the final stage of the qualification process, with series production scheduled to begin at the end of March 2026. In addition to the values listed in the datasheet, customer-specific variants within this range can also be realized. Furthermore, other sizes are available upon request: feasibility for the PMS in size 2512 has already been tested and can be implemented in a short time since existing equipment from shunt production can be used. The PMP in size 2010 is also a viable additional option. Samples are available upon request. (se)

Subscribe to the newsletter now

Don't Miss out on Our Best Content

Business E-mail

Please enter a valid mailadress.

By clicking on „Subscribe to Newsletter“ I agree to the processing and use of my data according to the consent form (please expand for details) and accept the Terms of Use. For more information, please see our Privacy Policy. The consent declaration relates, among other things, to the sending of editorial newsletters by email and to data matching for marketing purposes with selected advertising partners (e.g., LinkedIn, Google, Meta)

Date: 08.12.2025

Naturally, we always handle your personal data responsibly. Any personal data we receive from you is processed in accordance with applicable data protection legislation. For detailed information please see our privacy policy.

Consent to the use of data for promotional purposes

I hereby consent to Vogel Communications Group GmbH & Co. KG, Max-Planck-Str. 7-9, 97082 Würzburg including any affiliated companies according to §§ 15 et seq. AktG (hereafter: Vogel Communications Group) using my e-mail address to send editorial newsletters. A list of all affiliated companies can be found here

Newsletter content may include all products and services of any companies mentioned above, including for example specialist journals and books, events and fairs as well as event-related products and services, print and digital media offers and services such as additional (editorial) newsletters, raffles, lead campaigns, market research both online and offline, specialist webportals and e-learning offers. In case my personal telephone number has also been collected, it may be used for offers of aforementioned products, for services of the companies mentioned above, and market research purposes.

Additionally, my consent also includes the processing of my email address and telephone number for data matching for marketing purposes with select advertising partners such as LinkedIn, Google, and Meta. For this, Vogel Communications Group may transmit said data in hashed form to the advertising partners who then use said data to determine whether I am also a member of the mentioned advertising partner portals. Vogel Communications Group uses this feature for the purposes of re-targeting (up-selling, cross-selling, and customer loyalty), generating so-called look-alike audiences for acquisition of new customers, and as basis for exclusion for on-going advertising campaigns. Further information can be found in section “data matching for marketing purposes”.

In case I access protected data on Internet portals of Vogel Communications Group including any affiliated companies according to §§ 15 et seq. AktG, I need to provide further data in order to register for the access to such content. In return for this free access to editorial content, my data may be used in accordance with this consent for the purposes stated here. This does not apply to data matching for marketing purposes.

Right of revocation

I understand that I can revoke my consent at will. My revocation does not change the lawfulness of data processing that was conducted based on my consent leading up to my revocation. One option to declare my revocation is to use the contact form found at https://contact.vogel.de. In case I no longer wish to receive certain newsletters, I have subscribed to, I can also click on the unsubscribe link included at the end of a newsletter. Further information regarding my right of revocation and the implementation of it as well as the consequences of my revocation can be found in the data protection declaration, section editorial newsletter.